US3894359A - Device for cleaning steelworks molds - Google Patents

Device for cleaning steelworks molds Download PDF

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Publication number
US3894359A
US3894359A US431724A US43172474A US3894359A US 3894359 A US3894359 A US 3894359A US 431724 A US431724 A US 431724A US 43172474 A US43172474 A US 43172474A US 3894359 A US3894359 A US 3894359A
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US
United States
Prior art keywords
lance
mold
chambers
foundation pit
mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US431724A
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English (en)
Inventor
Alfred Linke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine AG
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Voestalpine AG
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Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
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Publication of US3894359A publication Critical patent/US3894359A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B22C23/02—Devices for coating moulds or cores

Definitions

  • ABSTRACT A device for cleaning steel works molds with at least two chambers, into which the molds that are to be cleaned are inserted.
  • the chambers are downwardly open and can be closed at the top by a lid. They are arranged side by side on a mold grate above the foundation pit and in the foundation pit a lance for blasting abrasives onto the inner walls of the mold is arranged on a substantially horizontal lance carrier, which is rotatable about a vertical axis, so that the lance can be brought into blasting position below each chamber in turn.
  • the invention relates to a device for cleaning steel works molds by means of a liftable and lowerable, as well as rotatable lance for blasting an abrasive onto the inner wall of the mold.
  • This procedure entails that in the chamber only one mold at a time can be cleaned and for cleaning the next mold one has to wait until the previous one has been removed from the chamber.
  • This disadvantage is of no importance for the operation of a mold casting plant, because there the preparation for casting and for the subsequent cooling of the casting in the mold takes much more time than the cleaning process.
  • a further disadvantage one can put up with in a mold casting plant lies in the fact that the lifting devices and additional means for the sand-blasting lance extend high above the chamber.
  • a pluralityat least two chambers which are downwardly open and capable of being closed at the top by a lid are arranged side by side on a mold grate above a foundation pit and that in the foundation pit the blasting lance is arranged for pivotal movement on a substantially horizontal lance carrier rotatable about a vertial axis, so that the lance can be brought into blasting position below one chamber after the other.
  • the chambers are capable of being closed by horizontally displaceable lids and preferably possess a common separating wall; in that the height of the horizontal lance carrier may be adjusted on a vertical column by means of a displaceable carriage; in that the blasting lance is carried rotatably in a housing on the horizontal lance carrier.
  • the blasting lance is capable of being connected via a rotary connection onto a conduit, preferably onto an articulated conduit for the supply with high-pressure water, e.g. with 200 at. gauge.
  • the mold grate is detachably fastened on the foundation pit and is liftable from and lowerable onto the foundation pit together with the chambers, forming with them a closed construction unit.
  • FIG. 1 is a vertical section through an installation of the present invention.
  • FIG. 2 is a pertaining side elevation
  • FIG. 3 is a top view with the lid being lifted off.
  • FIG. 1 a foundation pit is denoted with 1, above which two chambers 2, 3 with a common partition wall 5 are detachably arranged on a mold grate 4.
  • the mold grate 4 is mounted detachably on the foundation pit and is liftable-possibly together with the chambers 2, 3, forming with them a single construction unit by means of a crane, the foundation pit I thus being made accessible.
  • 6 denotes a lid displaceable or travelling in horizontal direction, respectively; a rail track 7, provided for this purpose is illustrated in FIG. 2.
  • the lid 6 closes the chamber 3, in which there is a mold 8, which is to be cleaned and which has been placed approximately in the center axis 9 of chamber 3 on the mold grate 4.
  • a second mold l1 (drawn in broken lines) is placed into the open chamber 2, while the mold 8 is being cleaned.
  • the lance 12 denotes a lance, to whose upper end a nozzle head 13 is attached, provided with e.g. four downwardly inclined nozzles 14 for the high-pressure water (200 at. gauge) to penetrate in direction of the inner walls of the mold 8.
  • the lance I2 is rotatable about its axis and liftable and lowerable in direction of the double arrow; the highest position 17' at the beginning of the cleaning process is drawn in broken lines. With its lower end the lance 12 is placed in a housing 15 and is carried rotatably.
  • the rotation drive I6 may be provided e.g. with a tooth wheel rim fastened to the lance 12, with a pinion and a hydraulically or electrically operable motor.
  • the jets of high-pressure water hit the inner walls of the mold 8.
  • the rotation drive 16 and the housing 15 are mounted on the horizontal lance carrier 19.
  • the carrier is rigidly mounted on a lance carriage 20, and the lance carriage 20 is guided on a vertical column 21 by means of a device (not shown) whose height may be adjusted.
  • bearings, denoted with 22 are provided, so that the lance carrier 19 together with the lance 12 is swivable selectively from the center axis 9 to the center axis 10 of chamber 2 and can be brought into blasting position.
  • a conduit 23 consisting of a number of joints is provided, which, on the one hand..is c,orm ted to a stationary high-pressure conduit'23', and. (in the other hand to a rotary connection known per se in the housing 15.
  • a container 24 common for both chambers 2, 3 for the reception of metaland slag particles is provided, while the water flows off through a conduit 25.
  • the swivel axis 27 of the lance guiding 21 is arranged outside the chambers 2, 3 (FIG. 3), equidistant from the center axes 9, 10, so that the cleaning process can be carried out alternatively in the one or the other chamber by swivelling the lance 12 in direction of the arrow 26.
  • the lid 6 is shifted above the respective mold that is to be cleaned, the drive suitably being locked, so that the lid cannot be moved until the cleaning of the mold is finished.
  • the swivelling of the lance by means of a device can be effected only when the lance is in its lowest position.
  • this device By means of this device it is possible to clean and cool large numbers of molds with a minimum of crane work and idle time, the space above the molds being kept completely free from machinery; in case the chambers 2, 3 are damaged, they can easily be exchanged for spare chambers, which, e.g. may consist of a simple sheet iron construction.
  • the device can be controlled in such a way that the nozzle head 13 can be moved downward and upward between the altitude lines l7, 18, possibly several times so that a perfect cleaning is possible, even of different mold sizes or of molds that have not been inserted centrally into the chambers.
  • the operation of the device is extremely easy, possibly it can be controlled fully automatically by using known devices, such as limit switches, time switches, relays, selenium cells, etc.
  • Apparatus in combination with a steel works foundation pit for cleaning steel works molds comprising:
  • grate means positioned above an upper open end of said foundation pit
  • said chambers including lid means for closing the tops thereof;
  • blasting lance assembly means comprising:
  • lance-carrying means including means projecting outwardly from a substantially vertical mounting axis
  • lance means mounted on said lance-carrying means remote from said mounting axis, said lance means being arranged to conduct and eject a flow of pressurized cleaning medium
  • said lance-carrying means for rotation about said mounting axis so as to selectively displace said lance means between a first position wherein it is located beneath a first of said chambers, a second position wherein it is located beneath a second of said chambers, and means mounting said lance means for up-and-down movement and rotary movement about its own substantially vertical longitudinal axis. relative to said chambers, in each of said first and second positions;
  • said lance means being communicable with a supply of pressurized cleaning medium such that:
  • said lance means located in said first position below a first steel works mold disposed in said first chamber, said lance means is arranged to be raised into said first mold and rotated about its own longitudinal axis while ejecting cleaning medium against said first mold, and
  • said lance means is rotated about said mounting axis to said second position below a second steel works mold disposed in said second chamber, said lance means is arranged to be raised into said second mold and rotated about its longitudinal axis while ejecting cleaning medium against said second mold, as said first mold is being replaced with another mold to be cleaned.
  • said means mounting said lance means for up-and-down movement includes a vertical column extending along said mounting axis, with said lance-carrying means being vertically movable along said column.
  • Apparatus according to claim 1 wherein said out' wardly projecting means of said lance-carrying means extends in a generally horizontal direction and includes a housing mounting said lance means for rotation about its own longitudinal axis.
  • Apparatus according to claim 1 including a conduit coupled to said lance means by a rotary connection at one end, and communicating with a high pressure water supply at its other end.
  • Apparatus according to claim 6 including a high pressure water supply conduit operatively coupled to said lance means for supplying water at a pressure of 200 atmospheric gauge.
  • Apparatus according to claim 1 including a container disposed at the bottom of said foundation pit for receiving steel and slag particles; and drain means being disposed in communication with said container for the removal of cleaning water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Cleaning In General (AREA)
US431724A 1973-01-18 1974-01-08 Device for cleaning steelworks molds Expired - Lifetime US3894359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT37673A AT323350B (de) 1973-01-18 1973-01-18 Einrichtung zum reinigen von stahlwerkskokillen

Publications (1)

Publication Number Publication Date
US3894359A true US3894359A (en) 1975-07-15

Family

ID=3488945

Family Applications (1)

Application Number Title Priority Date Filing Date
US431724A Expired - Lifetime US3894359A (en) 1973-01-18 1974-01-08 Device for cleaning steelworks molds

Country Status (12)

Country Link
US (1) US3894359A (cs)
AR (1) AR197069A1 (cs)
AT (1) AT323350B (cs)
BE (1) BE809916A (cs)
BR (1) BR7400295D0 (cs)
CA (1) CA990016A (cs)
CS (1) CS194204B2 (cs)
DE (1) DE2363958C3 (cs)
FI (1) FI54241C (cs)
LU (1) LU69172A1 (cs)
SE (1) SE380990B (cs)
ZA (1) ZA739575B (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750360B2 (de) * 1977-11-08 1981-03-19 Mannesmannröhren-Werke AG, 4000 Düsseldorf Vorrichtung zur Reinigung von Kokillen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US955469A (en) * 1909-11-10 1910-04-19 Empire Globe Company Sand-blast machine.
US2483956A (en) * 1947-06-09 1949-10-04 Western Electric Co Sand blasting machine
US2696910A (en) * 1948-06-09 1954-12-14 Svenska Flaektfabriken Ab Method and apparatus for separating waste particles from media used in sandblasting
US3769752A (en) * 1970-11-11 1973-11-06 Blastmaster Co Tekology Ltd Apparatus for shot blasting work members

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US955469A (en) * 1909-11-10 1910-04-19 Empire Globe Company Sand-blast machine.
US2483956A (en) * 1947-06-09 1949-10-04 Western Electric Co Sand blasting machine
US2696910A (en) * 1948-06-09 1954-12-14 Svenska Flaektfabriken Ab Method and apparatus for separating waste particles from media used in sandblasting
US3769752A (en) * 1970-11-11 1973-11-06 Blastmaster Co Tekology Ltd Apparatus for shot blasting work members

Also Published As

Publication number Publication date
CA990016A (en) 1976-06-01
LU69172A1 (cs) 1974-04-08
AR197069A1 (es) 1974-03-08
DE2363958B2 (de) 1980-08-21
SE380990B (sv) 1975-11-24
BE809916A (fr) 1974-05-16
DE2363958A1 (de) 1974-07-25
FI54241C (fi) 1978-11-10
CS194204B2 (en) 1979-11-30
ZA739575B (en) 1974-11-27
BR7400295D0 (pt) 1974-08-22
AT323350B (de) 1975-07-10
DE2363958C3 (de) 1981-05-21
FI54241B (fi) 1978-07-31

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